I just bought a 2003 YZ450F. Once I got the bike home and started to look it over I found that I can't get the clutch to work. Neutral works, but any gear I put the bike in and pull the clutch, the rear wheel doesn't spin (I'm not sure if that means the clutch is engaged or disengaged). In other words, it's always in a gear no matter what I do with the clutch lever. I've tightened the cable AND loosened the cable with no success. I can see the cable turning the linkage on the transmission, so it seems like it should be working, it just isn't. I'm going to presume that something's broken inside the transmission, but since I'm a novice, can anyone give me an idea where to look or what to look for? I've got a manual on the way (here next week) so that should help, but I want to open it up and take a look at the inside. Searching the interwebs hasn't been of much help. Any help would be enormously appreciated. Thanks in advance!